/Engine/Source/Runtime/Engine/Public/SparseVolumeTexture/ISparseVolumeTextureStreamingManager.h
Issues a rendering command for updating the streaming manager. This is not normally needed, but is necessary in cases where blocking requests are required and the SVT is used in a rendering command (which is executed before the streaming manager would normally update). A call to this function is not needed when the SVT is used in a regular pass called from FDeferredShadingSceneRenderer::Render().
void Update_GameThread()